28586197 has 4 divisors (see below), whose sum is σ = 30267756. Its totient is φ = 26904640.

The previous prime is 28586189. The next prime is 28586219. The reversal of 28586197 is 79168582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12013156 + 16573041 = 3466^2 + 4071^2 .

It is a cyclic number.

It is not a de Polignac number, because 28586197 - 2³ = 28586189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28586137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840754 + ... + 840787.

It is an arithmetic number, because the mean of its divisors is an integer number (7566939).

Almost surely, 2^28586197 is an apocalyptic number.

It is an amenable number.

28586197 is a deficient number, since it is larger than the sum of its proper divisors (1681559).

28586197 is a wasteful number, since it uses less digits than its factorization.

28586197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681558.

The product of its digits is 241920, while the sum is 46.

The square root of 28586197 is about 5346.6061197736. The cubic root of 28586197 is about 305.7633731055.

The spelling of 28586197 in words is "twenty-eight million, five hundred eighty-six thousand, one hundred ninety-seven".